Scale.



W. R. ALLEN.

SCALE. APILIATION FILED MAY 20, 19.10.

TED sTATEs-PATENT OFFICE;

WILLIAM RANDOLPH ALLEN,

or INDIANAPOLIS, INDIANA.

SCALE.

Specication of Letters Patent.

" :Patented Aug. 8,1911.

To all whom 'it may concern:

Be it known that I, IVILLIAM RANDOLPH ALLEN, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Scale, of which the follow- -ing is a specification.'

The ordinary machinists measuring scale is equipped with four 'sets of graduations reading in 8ths, lths, 32nds and 64ths and the average machinist finds that the divisions of the 64th scale are so small as to be confusing and, therefore,;in measuring for 64ths,

The Object of my Pre-sent invention is produce a scale by means of which accurate" measurements to the 64th (or other ne vision) may be accomplished by means of a scale, the'divisions of which are considerably farther apart than the measuring capacity of the scale.

The accompanying drawings illustrate my invention as applied to a scale with 64th divisions, although it is to be understood that my invention is ,not by any means limited to that particular use.

Figure 1 is a fragmentary side elevation of two companion series of the scale, and

Figf.)l a similar view of the two other companion series.

Inf the drawings, A indicates a series of graduations equally spaced from eachother 1/8 of an inch but having the initial graduation l0 spaced from the zero 0, 1/64 of an inch; B indicates'a similar set of graduations having its initial mark 10 spaced from the zero 0, 3/64 of an inch; C Indicates a series of graduations having its initial mark 10 spaced 5/64 of an inch from the zero 0, and D indicates a set of graduations having. its initial mark 10 spaced 7 /6/1- of an inch from thezero 0.

' If desired for convenience 'in reading, there may be provided a series of gradua- 'tions 11 uniformly spaced'from the zero 0 inch and the initial markings ofthe various scales are therefore spaced from the zero 0 on theodd 64ths. If the graduations of the scale were to be placed 1/ 16 of an inch apart (which is a readily readable division) it would then only be/necessary to provide two companion scales having their initial markings spaced 1/64 and 3/64 from the zero. If the scale is intended 'to be used only for measuring to the y32nd of an inch and the markings'of each scale are spaced 1/8 apart, two companion scales would be provided, the initial markings being l/32 and 3/32 from the zero.

In the drawings, the zero is establishedl'lasuring scale divided intol 32nds would bel'used.

4"Infforder to measure any distance equal to number of Sths plus 1764, scale A would be used; to measure a distance equal to a number of 8ths plus 3/64, scale B would be used, and scales C and B would be used to measure, respectively, distances equal to a number of Sths plus 5/64 or 7 /64A I wish it to be thoroughly understood tha while my improved scale is especially adapted for use in connection with fine divisions like 64ths, or ner, the invention is by no means limited to that particular use.

I claim as lmy invention:

1. A measuring scale comprising two or i each set .of the graduations being differently ofset from an established zero vby a subdivision of one of the said uniform spacingsf' i 3. A measuring scale cdmprising la plurality of independent sets.l of uniformly spaced graduatlons, the initial markings of the several sets of graduatiqns being/offset from an established zero by the odd numbers this eighteenth day of May, A. D. one thouof subdivisions 0f one of the uniform spacsand nine hundred and ten.

inve, there bein1 as many of the sets Qf lgldiiations as Jdere are odd subdivisions in WILLIAM RANDOLPH ALLEN' [1" S] 5l one of the uniform spaeings. Witnesses: vIn Witness whereof, I have' hereunto set CHESTER BRADFORD,

my-hand and seal at Indianapolis, Indiana, THOMAS W. MGMEANS.

A(lupies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

